Smith (ankle) is questionable to return Sunday against the Packers.
Smith's exit leaves Hunter Henry as the only healthy tight end for the Patriots. If the former is unable to return, he'll turn his efforts toward being available for Week 5 against the Lions.
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Patterson (thigh) was a limited participant at Wednesday's practice, Michael Rothstein of ESPN.com reports.
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Andersen will require surgery to address a torn pectoral muscle and could be sidelined for 4-to-6 months, D. Orlando Ledbetter of The Atlanta Journal-Constitution reports.
Smith caught five of eight targets for 37 yards during Sunday's 20-6 loss to the Lions.
Ridder completed 21 of 38 passes for 201 yards during Sunday's 20-6 loss versus Detroit. He also rushed twice for three yards.
Allgeier rushed seven times for 12 yards and caught two of three targets for 17 yards during Sunday's 20-6 loss versus Detroit.
Pitts caught five of nine targets for 41 yards during Sunday's 20-6 loss to the Lions. He also rushed once for minus-4 yards.
London caught two of six targets for 31 yards during Sunday's 20-6 loss versus Detroit.
Robinson rushed 10 times for 33 yards and caught four of six targets for 27 yards during Sunday's 20-6 loss to Detroit.
Patterson (thigh) is inactive for Sunday's matchup against the Lions, Tori McElhaney of the Falcons' official site reports.
Patterson (thigh) is listed as questionable for Sunday's game in Detroit.